package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/**
 * @Author: wzw
 * @CreateTime: 2025-09-30  00:24
 * @Description: TODO
 **/
@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Override
    @Transactional
    public void saveDishAndFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);
        //通过useGeneratedKeys="true" keyProperty="id" 获取自增主键 id是实体类中的id字段
        Long dishId = dish.getId();

        for (DishFlavor flavor : dishDTO.getFlavors()) {
            flavor.setDishId(dishId);
        }
        dishFlavorMapper.insertBatch(dishDTO.getFlavors());
    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * @description:
     * @author: wzw
     * @date: 2025/10/3 0003 15:19
     * @param: [ids]
     * @return: void
     **/
    @Override
    @Transactional
    public void delete(List<Long> ids) {
        // 判断当前菜品是否能够删除-是否是起售中的菜品
        for (Long id : ids) {
            Dish dish = dishMapper.findById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                //当前菜品处于起售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断当前菜品是否能够删除-是否被套餐关联
        List<Long> setmealIdsByDishId = setmealMapper.getSetmealIdsByDishId(ids);
        if (setmealIdsByDishId != null && setmealIdsByDishId.size() > 0) {
            //当前菜品被套餐关联，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的数据
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            //删除DishFlavor表数据
//            dishFlavorMapper.deleteByDishId(id);
//        }

        //根据菜品id集合批量删除菜品数据
        dishMapper.deleteByIds(ids);
        //根据菜品id批量删除菜品关联的口味数据
        dishFlavorMapper.deleteByDishIds(ids);


    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        Dish dish = dishMapper.findById(id);

        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;

    }

    @Override
    @Transactional
    public void update(DishDTO dishDTO) {
        //修改菜品基本信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);

        //删除原先的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //插入新的口味数据
        if (dishDTO.getFlavors() != null && dishDTO.getFlavors().size() > 0) {
            for (DishFlavor flavor : dishDTO.getFlavors()) {
                flavor.setDishId(dishDTO.getId());
            }
            dishFlavorMapper.insertBatch(dishDTO.getFlavors());
        }
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 批量起售停售
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder().id(id).status(status).build();
        dishMapper.update(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
